Why Nu-Trai Creates a More Personalized Macro Plan
Most calorie trackers ask how active you are. Nu-Trai asks how you actually spend your day.
A calorie or macro plan is only useful when it reflects the person following it.
Two people can be the same age, height, and weight but have very different nutritional needs. One may spend most of the day sitting in class, while the other walks across campus, works a standing job, runs errands, completes housework, and trains several times per week.
Many calorie trackers attempt to account for this difference by asking users to select a broad activity level. Nu-Trai takes the process further with a consultation-style onboarding experience designed to understand the user’s complete daily routine.
Instead of asking users to summarize their lives with a single label, Nu-Trai asks detailed questions about how they move, exercise, work, and spend their time.
It begins with an established metabolic equation
Nu-Trai starts by estimating the user’s basal metabolic rate, or BMR—the energy the body needs to support essential functions while at rest.
The app uses the Mifflin–St Jeor equation to estimate basal metabolic rate. In a 2024 study comparing 14 predictive equations with BMR measured through indirect calorimetry, Mifflin–St Jeor estimated BMR within 10% of the measured value for 73% of participants and was among the equations with the highest accuracy and lowest bias.¹
That gives Nu-Trai’s plan a scientifically established starting point.
However, BMR is only the beginning. A person also burns energy by walking, standing, exercising, working, completing household tasks, and performing other everyday activities. This total is generally represented by total daily energy expenditure, or TDEE.
The challenge is estimating that activity accurately.
Most apps rely on broad activity categories
Popular calorie trackers commonly ask users to choose from a small set of activity levels.
Their activity choices are broad categories such as “Not Very Active,” “Lightly Active,” “Active,” and “Very Active.”
These systems are simple, but they place an important decision in the user’s hands: the user must decide which generalized activity label most accurately describes an entire week of movement.
A student who lifts weights four days per week but sits through classes most of the day may not know whether to choose sedentary, lightly active, or active. Another student may never formally exercise but spend hours walking, standing at work, cleaning, and running errands.
Both may struggle to select the right category.
Nu-Trai treats onboarding like a nutrition consultation
Nu-Trai is designed to replace that single activity question with a more detailed conversation.
Its onboarding asks about several parts of daily expenditure, including:
Structured workouts
Time spent walking
Housework
Errands and other routine movement
General daily physical activity
These questions give Nu-Trai a more complete picture of the user’s lifestyle before it calculates a plan.
The difference is important. “Lightly active” can mean something different to every person. Asking how much time someone spends walking, standing, training, or completing physical tasks produces more specific information than asking that person to interpret a broad label.
Nu-Trai then uses this activity information to estimate TDEE and adjusts the calorie target according to the user’s goal, whether that is losing weight, gaining weight, or maintaining their current weight.
Nutrition planning that understands real life
A personalized nutrition plan should account for more than height, weight, and a self-selected activity label.
It should recognize that daily expenditure includes formal exercise as well as walking to class, standing at work, completing chores, shopping, commuting, and moving through everyday life. Physical activity encompasses movement performed during leisure, transportation, work, and domestic responsibilities—not only structured workouts.
Nu-Trai brings those details into the planning process from the beginning.
By combining an established BMR equation, a detailed assessment of daily activity, goal-based calorie adjustments, and individualized macro targets, Nu-Trai creates a plan that is designed around the person—not simply the category they select.
Other calorie trackers ask, “How active are you?”
Nu-Trai asks what your day actually looks like.
1. Van Dessel, K., Verrijken, A., De Block, C., Verhaegen, A., Peiffer, F., Van Gaal, L., De Wachter, C., & Dirinck, E. “Basal Metabolic Rate Using Indirect Calorimetry Among Individuals Living With Overweight or Obesity: The Accuracy of Predictive Equations for Basal Metabolic Rate.” Clinical Nutrition ESPEN, vol. 59, 2024, pp. 422–435. DOI: 10.1016/j.clnesp.2023.12.024.
